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# JarOutputStream

`public class JarOutputStream`
`` `` `` `` `extends ZipOutputStream` ``

java.lang.Object
↳ | java.io.OutputStream
| ↳ | java.io.FilterOutputStream
|  | ↳ | java.util.zip.DeflaterOutputStream
|  |  | ↳ | java.util.zip.ZipOutputStream
|  |  |  | ↳ | java.util.jar.JarOutputStream

The `JarOutputStream` class is used to write the contents of a JAR file to any output stream. It extends the class `java.util.zip.ZipOutputStream` with support for writing an optional `Manifest` entry. The `Manifest` can be used to specify meta-information about the JAR file and its entries.

See also:

- `Manifest`
- `ZipOutputStream`

## Summary

### Constants
`int` | `CENATT`
`int` | `CENATX`
`int` | `CENCOM`
`int` | `CENCRC`
`int` | `CENDSK`
`int` | `CENEXT`
`int` | `CENFLG`
`int` | `CENHDR`
`int` | `CENHOW`
`int` | `CENLEN`
`int` | `CENNAM`
`int` | `CENOFF`
`long` | `CENSIG`
`int` | `CENSIZ`
`int` | `CENTIM`
`int` | `CENVEM`
`int` | `CENVER`
`int` | `ENDCOM`
`int` | `ENDHDR`
`int` | `ENDOFF`
`long` | `ENDSIG`
`int` | `ENDSIZ`
`int` | `ENDSUB`
`int` | `ENDTOT`
`int` | `EXTCRC`
`int` | `EXTHDR`
`int` | `EXTLEN`
`long` | `EXTSIG`
`int` | `EXTSIZ`
`int` | `LOCCRC`
`int` | `LOCEXT`
`int` | `LOCFLG`
`int` | `LOCHDR`
`int` | `LOCHOW`
`int` | `LOCLEN`
`int` | `LOCNAM`
`long` | `LOCSIG`
`int` | `LOCSIZ`
`int` | `LOCTIM`
`int` | `LOCVER`

### Inherited constants
From class `java.util.zip.ZipOutputStream`
`int` | `CENATT`
`int` | `CENATX`
`int` | `CENCOM`
`int` | `CENCRC`
`int` | `CENDSK`
`int` | `CENEXT`
`int` | `CENFLG`
`int` | `CENHDR`
`int` | `CENHOW`
`int` | `CENLEN`
`int` | `CENNAM`
`int` | `CENOFF`
`long` | `CENSIG`
`int` | `CENSIZ`
`int` | `CENTIM`
`int` | `CENVEM`
`int` | `CENVER`
`int` | `DEFLATED` Compression method for compressed (DEFLATED) entries.
`int` | `ENDCOM`
`int` | `ENDHDR`
`int` | `ENDOFF`
`long` | `ENDSIG`
`int` | `ENDSIZ`
`int` | `ENDSUB`
`int` | `ENDTOT`
`int` | `EXTCRC`
`int` | `EXTHDR`
`int` | `EXTLEN`
`long` | `EXTSIG`
`int` | `EXTSIZ`
`int` | `LOCCRC`
`int` | `LOCEXT`
`int` | `LOCFLG`
`int` | `LOCHDR`
`int` | `LOCHOW`
`int` | `LOCLEN`
`int` | `LOCNAM`
`long` | `LOCSIG`
`int` | `LOCSIZ`
`int` | `LOCTIM`
`int` | `LOCVER`
`int` | `STORED` Compression method for uncompressed (STORED) entries.

### Inherited fields
From class `java.util.zip.DeflaterOutputStream`
`protected byte[]` | `buf` Output buffer for writing compressed data.
`protected Deflater` | `def` Compressor for this stream.
From class `java.io.FilterOutputStream`
`protected OutputStream` | `out` The underlying output stream to be filtered.

### Public constructors
`JarOutputStream(OutputStream out, Manifest man)` Creates a new `JarOutputStream` with the specified `Manifest`.
`JarOutputStream(OutputStream out)` Creates a new `JarOutputStream` with no manifest.

### Public methods
`void` | `putNextEntry(ZipEntry ze)` Begins writing a new JAR file entry and positions the stream to the start of the entry data.

### Inherited methods
From class `java.util.zip.ZipOutputStream`
`void` | `close()` Closes the ZIP output stream as well as the stream being filtered.
`void` | `closeEntry()` Closes the current ZIP entry and positions the stream for writing the next entry.
`void` | `finish()` Finishes writing the contents of the ZIP output stream without closing the underlying stream.
`void` | `putNextEntry(ZipEntry e)` Begins writing a new ZIP file entry and positions the stream to the start of the entry data.
`void` | `setComment(String comment)` Sets the ZIP file comment.
`void` | `setLevel(int level)` Sets the compression level for subsequent entries which are DEFLATED.
`void` | `setMethod(int method)` Sets the default compression method for subsequent entries.
`void` | `write(byte[] b, int off, int len)` Writes an array of bytes to the current ZIP entry data.
From class `java.util.zip.DeflaterOutputStream`
`void` | `close()` Writes remaining compressed data to the output stream and closes the underlying stream.
`void` | `deflate()` Writes next block of compressed data to the output stream.
`void` | `finish()` Finishes writing compressed data to the output stream without closing the underlying stream.
`void` | `flush()` Flushes the compressed output stream.
`void` | `write(byte[] b, int off, int len)` Writes an array of bytes to the compressed output stream.
`void` | `write(int b)` Writes a byte to the compressed output stream.
From class `java.io.FilterOutputStream`
`void` | `close()` Closes this output stream and releases any system resources associated with the stream.
`void` | `flush()` Flushes this output stream and forces any buffered output bytes to be written out to the stream.
`void` | `write(byte[] b)` Writes `b.length` bytes to this output stream.
`void` | `write(byte[] b, int off, int len)` Writes `len` bytes from the specified `byte` array starting at offset `off` to this output stream.
`void` | `write(int b)` Writes the specified `byte` to this output stream.
From class `java.io.OutputStream`
`void` | `close()` Closes this output stream and releases any system resources associated with this stream.
`void` | `flush()` Flushes this output stream and forces any buffered output bytes to be written out.
`void` | `write(byte[] b)` Writes `b.length` bytes from the specified byte array to this output stream.
`void` | `write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this output stream.
`abstract void` | `write(int b)` Writes the specified byte to this output stream.
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `java.io.Closeable`
`abstract void` | `close()` Closes this stream and releases any system resources associated with it.
From interface `java.io.Flushable`
`abstract void` | `flush()` Flushes this stream by writing any buffered output to the underlying stream.
From interface `java.lang.AutoCloseable`
`abstract void` | `close()` Closes this resource, relinquishing any underlying resources.

## Constants

### CENATT

    public static final int CENATT

Constant Value: 36 (0x00000024)

### CENATX

    public static final int CENATX

Constant Value: 38 (0x00000026)

### CENCOM

    public static final int CENCOM

Constant Value: 32 (0x00000020)

### CENCRC

    public static final int CENCRC

Constant Value: 16 (0x00000010)

### CENDSK

    public static final int CENDSK

Constant Value: 34 (0x00000022)

### CENEXT

    public static final int CENEXT

Constant Value: 30 (0x0000001e)

### CENFLG

    public static final int CENFLG

Constant Value: 8 (0x00000008)

### CENHDR

    public static final int CENHDR

Constant Value: 46 (0x0000002e)

### CENHOW

    public static final int CENHOW

Constant Value: 10 (0x0000000a)

### CENLEN

    public static final int CENLEN

Constant Value: 24 (0x00000018)

### CENNAM

    public static final int CENNAM

Constant Value: 28 (0x0000001c)

### CENOFF

    public static final int CENOFF

Constant Value: 42 (0x0000002a)

### CENSIG

    public static final long CENSIG

Constant Value: 33639248 (0x0000000002014b50)

### CENSIZ

    public static final int CENSIZ

Constant Value: 20 (0x00000014)

### CENTIM

    public static final int CENTIM

Constant Value: 12 (0x0000000c)

### CENVEM

    public static final int CENVEM

Constant Value: 4 (0x00000004)

### CENVER

    public static final int CENVER

Constant Value: 6 (0x00000006)

### ENDCOM

    public static final int ENDCOM

Constant Value: 20 (0x00000014)

### ENDHDR

    public static final int ENDHDR

Constant Value: 22 (0x00000016)

### ENDOFF

    public static final int ENDOFF

Constant Value: 16 (0x00000010)

### ENDSIG

    public static final long ENDSIG

Constant Value: 101010256 (0x0000000006054b50)

### ENDSIZ

    public static final int ENDSIZ

Constant Value: 12 (0x0000000c)

### ENDSUB

    public static final int ENDSUB

Constant Value: 8 (0x00000008)

### ENDTOT

    public static final int ENDTOT

Constant Value: 10 (0x0000000a)

### EXTCRC

    public static final int EXTCRC

Constant Value: 4 (0x00000004)

### EXTHDR

    public static final int EXTHDR

Constant Value: 16 (0x00000010)

### EXTLEN

    public static final int EXTLEN

Constant Value: 12 (0x0000000c)

### EXTSIG

    public static final long EXTSIG

Constant Value: 134695760 (0x0000000008074b50)

### EXTSIZ

    public static final int EXTSIZ

Constant Value: 8 (0x00000008)

### LOCCRC

    public static final int LOCCRC

Constant Value: 14 (0x0000000e)

### LOCEXT

    public static final int LOCEXT

Constant Value: 28 (0x0000001c)

### LOCFLG

    public static final int LOCFLG

Constant Value: 6 (0x00000006)

### LOCHDR

    public static final int LOCHDR

Constant Value: 30 (0x0000001e)

### LOCHOW

    public static final int LOCHOW

Constant Value: 8 (0x00000008)

### LOCLEN

    public static final int LOCLEN

Constant Value: 22 (0x00000016)

### LOCNAM

    public static final int LOCNAM

Constant Value: 26 (0x0000001a)

### LOCSIG

    public static final long LOCSIG

Constant Value: 67324752 (0x0000000004034b50)

### LOCSIZ

    public static final int LOCSIZ

Constant Value: 18 (0x00000012)

### LOCTIM

    public static final int LOCTIM

Constant Value: 10 (0x0000000a)

### LOCVER

    public static final int LOCVER

Constant Value: 4 (0x00000004)

## Public constructors

### JarOutputStream

    public JarOutputStream (OutputStream out,
                    Manifest man)

Creates a new `JarOutputStream` with the specified `Manifest`. The manifest is written as the first entry to the output stream.

Parameters
`out` | `OutputStream`: the actual output stream
`man` | `Manifest`: the optional `Manifest`

Throws
`IOException` | if an I/O error has occurred

### JarOutputStream

    public JarOutputStream (OutputStream out)

Creates a new `JarOutputStream` with no manifest.

Parameters
`out` | `OutputStream`: the actual output stream

Throws
`IOException` | if an I/O error has occurred

## Public methods

### putNextEntry

    public void putNextEntry (ZipEntry ze)

Begins writing a new JAR file entry and positions the stream to the start of the entry data. This method will also close any previous entry. The default compression method will be used if no compression method was specified for the entry. The current time will be used if the entry has no set modification time.

Parameters
`ze` | `ZipEntry`: the ZIP/JAR entry to be written

Throws
`ZipException` | if a ZIP error has occurred
`IOException` | if an I/O error has occurred

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